NE Park Update: Parcel D TPH Cleanup is Complete

30 Jun

During May-June 2014, a remediation crew from V3 Companies performed dig/haul of petroleum-impacted soil on Parcel D within the NE Park site .  The objective of the work was to remove soil impacted with levels of total petroleum hydrocarbons (TPH) that exceed site-specific Illinois EPA cleanup standards. Summary of findings of fieldwork below and can also be accessed online.

Excavation in Action!

Soil Remediation Activities

The cleanup work was performed in accordance with the IEPA-approved Remedial Action Plan (RAP) consisted of the excavation and haul-off of approximately 300 tons of TPH-impacted soils, and landfill disposal of these soils as a non-hazardous certified special waste.

After the impacted soils were removed, V3 collected soil verification samples from the excavation sidewalls and bottom. Soil analytical results for the verification samples were well below the site-specific soil TPH cleanup objective. No further soil remediation is required to address the issue.

Exploration for the Suspected Storm Sewer

While the cleanup excavation was open, V3 also explored the area where an suspected concrete storm sewer was previously observed in a soil boring. The excavator encountered concrete debris and a concrete floor slab at a depth of approximately 10 feet below grade, where water was observed flowing from beneath the slab. Remnants of the original soil boring were also encountered in this area. After further digging, no actual storm drain or sewer was found. It is evident that the concrete slab and groundwater found in the excavation were the features observed in the previous soil boring.  Thus, there is no evidence of a storm sewer in this area. The materials were actually a piece of the former building foundation from when the site was a brickyard long ago. No further work is required to address this matter.

Excavation Backfill

Parcel D TPH Cleanup - backfilled-looking south 060514

The remediation excavation was subsequently backfilled with the stockpiled overburden soils and clean soil that was imported to the site.  The area was rough-graded smooth to match the surrounding ground surface.

GW Monitoring Well Installation

One permanent groundwater monitoring well was installed down-gradient from the TPH cleanup area.  No obvious evidence of TPH impacts was observed in the well boring soil samples, and no visual evidence of petroleum product or impacts was observed in the groundwater samples.   Soil samples were collected for laboratory analysis of BTEX, PAHs and TPH.  Groundwater samples were analyzed for BTEX and PAHs.Post Remediation Activities

Soil analytical results were reported to be non-detect for BTEX and well below the site-specific TPH soil cleanup objective.  Groundwater analytical results were reported to be non-detect for BTEX and PAHs. No further action is required with respect to groundwater down-gradient from the cleanup area.

The cleanup activities and results will be documented in the forthcoming Interim Remedial Action Completion Report (RACR), which will be submitted to the Illinois EPA Site Remediation Program for review in the 1st week of July.

Parcel D TPH-Clean Excavation Completed 05/30/2014

5 Jun

Dig-Haul Completedphoto 3_ParcelD-TPH-Cleanup_5.30.14

If anyone noticed, V3’s remediation crew was on-site last Friday, 05/30 digging TPH-impacted soil at 7:00 in the morning. Our consultants informed that the long-awaited removal and disposal went very well. The cleanup went pretty fast, still Aaron Carpenter, our Brownfields Coordinator was able to capture a few good shots of the work-in-progress. 
About 300 tons of total volume of soil was removed and visually, the dig looked good. V3 collected the verification samples and sent them to lab for expedited analysis. Results of the verification samples came in on 06/04/14……. And data results are below the Total Petroleum Hydrocarbon (TPH) goal. RW Collins will backfill the excavated area with clean fill material, today 06/05/14.
V3 will provide a written summary of their findings sometime next week, so we’ll provide more information as it becomes available.

Next Steps

V3 is waiting on the driller to schedule the installation of the monitoring well, likely for the week of 06/09/14.
V3 has already started the draft Remedial Action Cleanup Report (RACR) to document the final results. The draft will be completed before the end of June. We anticipate that the report will be submitted to IEPA for approval before mid-July. The City has plans to develop this property into future green openspace and naturalized stormwater management area.

Parcel D TPH-Cleanup: Fieldwork Confirmed for Friday, 05/30/2014

29 May

V3 has confirmed that field remediation activities  will begin on Friday, May 30. The work to be performed is mostly one field day for the excavation & haul-off and to collect verification soil samples, followed by 1-2 days for lab analysis. If results indicate that additional dig/haul is needed, the process will be repeated. The cleanup is expected to be completed within 4-5 days.

Review the updated Parcel D TPH Cleanup Fact Sheet to know more about the cleanup and answers to your concerns about risks to public health.

If you have any questions or concerns regarding this cleanup, feel free to write to us at brownfields@cityofblueisland.org.